pentaglycine

例句：

1. 1. The peptide sequence is a critical part of the protein structure.
   肽序列是蛋白质结构的关键部分。
2. 2. This amino acid is essential for the growth and development of many cells.
   这种氨基酸对于许多细胞的生长和发育至关重要。
3. 3.Peptides are often used in drug development due to their ability to bind to specific receptors.
   由于其与特定受体的亲和力，肽在药物开发中经常被使用。